GB2360155B - Switched current sources - Google Patents

Switched current sources

Info

Publication number
GB2360155B
GB2360155B GB0005486A GB0005486A GB2360155B GB 2360155 B GB2360155 B GB 2360155B GB 0005486 A GB0005486 A GB 0005486A GB 0005486 A GB0005486 A GB 0005486A GB 2360155 B GB2360155 B GB 2360155B
Authority
GB
United Kingdom
Prior art keywords
current sources
switched current
switched
sources
current
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
GB0005486A
Other versions
GB0005486D0 (en
GB2360155A (en
Inventor
David Mark Chapman
Martin Andrew Fryer
Dominic Charles Royce
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nokia of America Corp
Original Assignee
Lucent Technologies Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Lucent Technologies Inc filed Critical Lucent Technologies Inc
Priority to GB0005486A priority Critical patent/GB2360155B/en
Publication of GB0005486D0 publication Critical patent/GB0005486D0/en
Publication of GB2360155A publication Critical patent/GB2360155A/en
Application granted granted Critical
Publication of GB2360155B publication Critical patent/GB2360155B/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03L—AUTOMATIC CONTROL, STARTING, SYNCHRONISATION OR STABILISATION OF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES
    • H03L7/00—Automatic control of frequency or phase; Synchronisation
    • H03L7/06—Automatic control of frequency or phase; Synchronisation using a reference signal applied to a frequency- or phase-locked loop
    • H03L7/08—Details of the phase-locked loop
    • H03L7/085—Details of the phase-locked loop concerning mainly the frequency- or phase-detection arrangement including the filtering or amplification of its output signal
    • H03L7/089—Details of the phase-locked loop concerning mainly the frequency- or phase-detection arrangement including the filtering or amplification of its output signal the phase or frequency detector generating up-down pulses
    • H03L7/0891—Details of the phase-locked loop concerning mainly the frequency- or phase-detection arrangement including the filtering or amplification of its output signal the phase or frequency detector generating up-down pulses the up-down pulses controlling source and sink current generators, e.g. a charge pump
    • H03L7/0895—Details of the current generators
GB0005486A 2000-03-07 2000-03-07 Switched current sources Expired - Fee Related GB2360155B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB0005486A GB2360155B (en) 2000-03-07 2000-03-07 Switched current sources

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB0005486A GB2360155B (en) 2000-03-07 2000-03-07 Switched current sources

Publications (3)

Publication Number Publication Date
GB0005486D0 GB0005486D0 (en) 2000-04-26
GB2360155A GB2360155A (en) 2001-09-12
GB2360155B true GB2360155B (en) 2003-10-01

Family

ID=9887140

Family Applications (1)

Application Number Title Priority Date Filing Date
GB0005486A Expired - Fee Related GB2360155B (en) 2000-03-07 2000-03-07 Switched current sources

Country Status (1)

Country Link
GB (1) GB2360155B (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6888386B2 (en) * 2002-04-23 2005-05-03 Winbond Electronics Corporation Method and apparatus for change pump circuit
DE10252618A1 (en) * 2002-11-11 2004-05-27 Infineon Technologies Ag Circuit arrangement for a charging pump for phase locked loops has alternative path for output potential according to switching condition
US8229043B2 (en) * 2008-03-21 2012-07-24 Qualcomm Incorporated Stepped gain mixer

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5473283A (en) * 1994-11-07 1995-12-05 National Semiconductor Corporation Cascode switched charge pump circuit
US5825640A (en) * 1997-06-30 1998-10-20 Motorola, Inc. Charge pump circuit and method
US5861766A (en) * 1997-04-17 1999-01-19 Western Digital Corporation Multimode frequency synthesizer having high loop gain in frequency seek mode

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5473283A (en) * 1994-11-07 1995-12-05 National Semiconductor Corporation Cascode switched charge pump circuit
US5861766A (en) * 1997-04-17 1999-01-19 Western Digital Corporation Multimode frequency synthesizer having high loop gain in frequency seek mode
US5825640A (en) * 1997-06-30 1998-10-20 Motorola, Inc. Charge pump circuit and method

Also Published As

Publication number Publication date
GB0005486D0 (en) 2000-04-26
GB2360155A (en) 2001-09-12

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee